Abstract:
:The deployment of heterosis in the form of hybrid rice varieties has boosted grain yield, but grain quality improvement still remains a challenge. Here we show that a quantitative trait locus for rice grain quality, qGW7, reflects allelic variation of GW7, a gene encoding a TONNEAU1-recruiting motif protein with similarity to C-terminal motifs of the human centrosomal protein CAP350. Upregulation of GW7 expression was correlated with the production of more slender grains, as a result of increased cell division in the longitudinal direction and decreased cell division in the transverse direction. OsSPL16 (GW8), an SBP-domain transcription factor that regulates grain width, bound directly to the GW7 promoter and repressed its expression. The presence of a semidominant GW7(TFA) allele from tropical japonica rice was associated with higher grain quality without the yield penalty imposed by the Basmati gw8 allele. Manipulation of the OsSPL16-GW7 module thus represents a new strategy to simultaneously improve rice yield and grain quality.
journal_name
Nat Genetjournal_title
Nature geneticsauthors
Wang S,Li S,Liu Q,Wu K,Zhang J,Wang S,Wang Y,Chen X,Zhang Y,Gao C,Wang F,Huang H,Fu Xdoi
10.1038/ng.3352subject
Has Abstractpub_date
2015-08-01 00:00:00pages
949-54issue
8eissn
1061-4036issn
1546-1718pii
ng.3352journal_volume
47pub_type
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